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12225 Yanfernandez (1985 PQ)
Classification: Main-belt Asteroid          SPK-ID: 2012225
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .194085769347936 1.3982e-08  
a 2.2129536027533 5.6897e-09 au
q 1.783450800231639 3.0059e-08 au
i 4.767466993200422 1.2315e-06 deg
node 153.6632665216996 1.3549e-05 deg
peri 116.3885885383482 1.8928e-05 deg
M 304.4112055009869 7.8749e-06 deg
tp 2459386.169960442803
(2021-Jun-20.66996044)
2.6618e-05 TDB
period 1202.421933445523
3.29
4.6373e-06
1.27e-08
d
yr
n .2993957362108534 1.1547e-09 deg/d
Q 2.642456405274962 6.794e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2421  
   data-arc span      15647 days (42.84 yr)  
   first obs. used      1978-05-06  
   last obs. used      2021-03-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48868  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 23:12:32  

Additional Information
 Earth MOID = .771881 au 
 Jupiter MOID = 2.46681 au 
 T_jup = 3.626 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.21   n/a E2021B10  
diameter diameter 4.078 km 0.187 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.222   0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

12225 Yanfernández           Discovered 1985 Aug. 14 by E. Bowell at the Anderson Mesa Station of the Lowell Observatory.
Yanga R. Fernández (b. 1971) completed his thesis on the albedo and size distribution of cometary nuclei at the University of Maryland in 1999. Since then, at the University of Hawaii, he has measured albedos of other small bodies, recovered comets and discovered new jovian satellites. The name was suggested by M. F. A'Hearn.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20011130/MPCPages.arcLast Updated: 2009-05-11

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Alternate Designations
 1985 PQ = 1978 JM1 = 1991 ED1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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